Question

A disk scheduling system receives requests for the following cylinders: 98, 183, 37, 122, 14, 124, 65, 67. If the current position of the disk head is at cylinder 53, and the system uses the SCAN algorithm, which cylinder is serviced immediately after 65?

Q: Answer-A disk scheduling system receives requests for the following cylinders: 98, 183, 37, 122, 14, 124, 6...

The SCAN algorithm moves the disk head in one direction, servicing all requests until it reaches the end, then reverses direction. 1. Initial direction upwards. 2. Sequence of servicing 65 67 98 122 124 reverses 37 14. 3. After servicing 65, the next request in the upward direction is 67. Why Other Options Are Incorrect B 14 C 37 These are serviced after the head reverses direction. D 98 E 122 These are serviced later in the upward direction, but after 67.